Overall Dimensions â High School. High School Overall football field dimensions are as follows: Length: 360 feet or 120 yards. Width: 160 feet or 53 1/3 yards. End Zone: High School end zones are 10 yards deep. End Line: A six foot end line border marks the back of the end zone. Field Numbers: Sideline field numbers are 6 foot high by 4 foot wide designating each 10 yard line marker.
1 On average, dogs have two cycles a year. 2  The estrus cycle lasts on average 12-21 days, but maybe be as short as a few days to four weeks. 3  The estrus period length varies widely between breeds and individual dogs. 4  The length of a cycle varies widely, even for dogs of the same breed.
The average heat cycle for a dog is approximately 3 weeks and since this an an average, some heats are shorter (as little as 7-10 days), others are longer (4 weeks or more). Average times between heat periods is 7 months but some dogs can cycle as early as every 4 months, some once a year.hen a dog is in heat, it is usually a three week cycle, going in, in, and going out. The second week is when the female will allow the male dog to breed with her. I have seen female's breed in the last week.